Improvement in mechanical movements



MECHANICAL-MOVEMENT. N.173,93o. Patented Feb. zz, 118475.

IMILESSS- I vEqlm gw@ MZ /g N4 PETERS. PHO'T@UTI-lOi-ERAFIEHl WASH NGTOND C UNITED STATES PATENT OFFICE.

JosEPE E. EINNEY, 0E PITTsBUEe, PENNSYLVANIA.

IMPROVEMENT IN MECHANICAL MOVEMENTS.

Specification forming part of Letters Patent No. 173,930, dated February22, 1876; application filed November 23, 1875.

To all 'whom it may concern Be it known that I, J osEPH R. FINNEY, 'of'Pittsburg, in the county of Allegheny and State of Pennsylvania, haveinvented a new and useful Iinproveinentin Mechanical Movement; and I dohereby declare the following to be a ful, clear, and exact descriptionthereof, reference being had to the accoml'ianying drawing, forming apart of this specification, in which- The several figures, from l to 4,illustrate my invention, the arrows indicating the direction in whichthe shaf'ts revolve.

My invention relates t0 a mechanical movement for translnitting powerfrom shaft t0 shaft, whereby a reverse motion of the shafting may beobtained without the Vuse of belts or gearing; and it consists inconnecting the shafts 'off their axial centers by`means of a pit- Inanguided by Ways or a slot arranged between the shal'ting.

In the drawing, a a indicate shafting, each provided with a crank-arm,b, Which gives at! tachment to the pitman c that connects the shafting.The pitman c is provided at or near its middle with a pin, d, travelingin a slot, c, formed inthe frame-Work of a machine,

or specially provided for when the shafting is y not journaled in aframe. This slot c acts as a guide to chan ge the direction of thepitman, and may be made by joining two ovals, as shown, the outlines ofwhich represent the path through which a point upon the pitinan midwaybetween the points of attachment to the shafting travels when the shaftsare revolving'in opposite directions. An anti-friction roller may beused upon the pin d, if desired. The slot c is shown as made on a linepassing ,through the axes of the shafts, the curved sides of the slotserving to give support to the pitnian.1 but said Vcurves are notabsolutely necessary. This mechanical movement is especially adapted toconnect the feeding devices of nail-machines,to which it has beenapplied by me, but is capable of useful employment in numerous otherinstances where a compact mechanism for transmitting power and obtainingreverse mot-ion is desired, and Where bolts and cog or bevel gearing areobjectionable.

I am aware that motion has been transferred from one shaft to another bymeans of a connecting-lever, slotted at the middle and at one endlongitudinally to play upon a fixed pin, and lay no claim thereto, saiddevices being productive of irregular motion on the shafts and ot'dead-centers, While in my invention the length of lever is positive andthe fulcrum Y changeable, so as to avoid dead-centers and oibtainuniform motion.

Having thus described my invention, I claimy In combination with twoshafts, a pitman connected to the shafts at a point outside the axialcenters, and moving in guides, inclined or cam-shaped, substantially asand for the purpose specified. l

In testimony whereof l', the said JOSEPH R. FINNEY, have hereunto set myhand.

JOSEPH It. FINNEY. Witnesses:

JAMES BLACK, W. J. MATHEWS.

